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Which of the following compounds is high...

Which of the following compounds is highly soluble in water ?

A

`CaF_(2)`

B

`MgF_(2)`

C

`BeF_(2)`

D

`BaF_(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
Owing to the high hydration energy of `Be^(2+)` `(-2494kJmol^(-1))` in forming `[Be(H_(2)O)_(4)]^(2+)` beryllium fluoride is very soluble in water. All the other fluorides, `MF_(2)` which are ionic are almost insoluble in water as their as their hydration enthalpies are not able to outweigh their lattice enthalpies. Howerver,
The solubility increases slightly with increase in cation size due to the decrease of charge density.
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Knowledge Check

  • Which of the following compounds is/are not soluble in water ?

    A
    NaCI
    B
    LiF
    C
    `Li_(2)CO_(3)`
    D
    `Na_(2)CO_(3)`

  • Which of the following compounds is/are not soluble in water?

    A
    `Li_(2)CO_(3)`
    B
    `LiF`
    C
    `Li_(3)PO_(4)`
    D
    All of these

  • Which of the following compounds are readily soluble in water?

    A
    `BeSO_(4)`
    B
    `MgSO_(4)`
    C
    `BaSO_(4)`
    D
    `SrSO_(4)`

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